Combination lock



May 1o, 193s. A. KITTLER 2,116,837

COMBINATION LOCK MW /fwizw May 10, 193.8.

A. KITTLER COMBINATION LOCK Filed June 21 1935 2 Sheets-Sheet 2 Patented May 10, 1938 UNITED STATES COMBINATION Loox Antonin Kittler, Prague; Czechoslovakia mpiiatimrY June .21, 1935,v serial No. 27,806

,In Czechoslovakia Februar-8,1935

l1 Claim.

The subject of the invention is a combination lock of the kind in which` several. concentrically mounted tumblerscare connected with sleeves which are slid into each other upon a shaftA or a guide pin., these sleeves being divided by cross slots and their' separated end portionsv being connected with acorrcsponding number `of slotted discs arranged above 4each other, Which discs have a considerable number of blind slots and a proper radial slot, which latter co-operates with a knife sliding `together with the bolt.

The object of this-invention is to prevent any lalterati-on of the combination by an unauthorized person, and also to effect immediateclosing of the door by the aid of a predetermined combination without `setting the latter every time the door is closed, by merely sliding the bolt into the locking position by turning a knob arranged upon the shaft Aor pin, (or from the inside by operating an oscillating lever knob arranged upon the bolt,) so that the lock can be closedy without using -th-e combination from` both sidesand can also be opened' from the inside without' using the combination, but -it can be opened from the outside only after `setti-ng uprthe .combination.` The lock, however, may,` lif required, `be locked by simple means againsty opening from the inside without using the` combination.

'Ihe invention also relates to a particular device for automatically displacing the` tumblers as soon as, after the setting up of the combination, the lock has been openedor closed, Without however cancelling the validity of the given combination for a new operation of the lock.`

Instead of the sleeves which are slid" upon each other, concentric, divided into two parts and in engagement with eachother by edge teeth known per se, there may be used according to the invention with advantage undivided sleeves, the direct engagement of which with the tumblers can be cancelled.

In the `drawings is illustrated a constructional example of the invention with appertainng details and modiiications.

Fig. 1 shows a rear View i. e. aview from the inner side of the door upon the lockafter removal of the iront cover wall substantially in the section `,plane I'-I of Fig. 2,

Fig. 2 is a horizontal section through the lock on line II-II of Fig; 1,1

Fig. 3 is a top view of the bolt in the section plane II--III of Fig. l,

Fig. 4 is a corresponding side view,

Fig. 5 is a detailnof` Fig. 2,

Fig. 6 is in horizontal section a modiiication of the construction according to Figs. 1 and 2,

Fig. 7 is a vertical section through a part of this arrangement on line VII-VII of Fig. 6,

Fig. 8 is a side view of the bolt omitting some parts of Fig. 6.

According` to Figs. 1 `to 4, the bolt I0 slides by I3- of the bolt `Illtwhichlatter is provided in.r

itsmiddle portionwith a substantially rectangular recess Il which on displacement of the bolt i0" intol the Aopen position I0 or back into the locking` position:Y according to Figs. 1 and 2, moves in transverse direction with regard to the shaft I I.

Upon the shaft I-I areloosely slid sleeves I5, I5', thenuinber ,et which may `be `greater than two, andr which lcarry the corresponding slotted discs I6,. I6', The discs are, according to the invention` constructed dish-shaped inv the vicinity of the hub, and` are provided upon the periphery with an vannular flange with` false slots Ill and an effective radial recess-l8` (Figs. 11 and 2). The dish-shaped lportion of the slotted disc I5 arranged nearest to thebolt I0 is provided with a rearwardly projecting annular projection` ISa, the object `of Which-will be more fully described.

To a givenv number of dishf-shaped` discs IS and` |16 withV corresponding sleeves I5 and I5 upon the pin III, corresponds also the number of the dial rings I9, `I9 upon the front side of the door, not counting the stationary dial ring ISa as the `proporsi-scale `ring with letters, numerals or` other .stationarysigns The false slots Il upon the periphery of the discs Iii, I6 prevent ink-now/rr.` manner ascertaining or feeling the correct recess lfwby the fence of the bolt I (l. Theience'of the `bolt `Ill'consistsin the illustrated constructiona'l.: example of' a" narrownose 24 of the double-armed oscillating lever 24 loaded by a 'spring 51",.` which: is provided with a hand grip 25 and: projects fromt'helock at the inner side of the door, that is, into "the locked room. The lever 24 `turnsa'bout the pivot 25. This hand gripmayrnof course, be also omitted, or may be detachable' if required, in order to prevent operation of the lock from theinside.

The longitudinal recess I4 in` bolt lll is provided atleast upon one of its long sides with a flat projection 34 which possesses `a shallow recess 20 Awith inclined end faces 210 which enable the slidable sleeve: I5` .to be depressed by means of its annularprojection IGa upon slotted disc It of shaft I'I` on insertion vof Vthe forked arms 2| of the yoke 2| `(Figs. 2 and 5) the yoke is slidable at' the inner side of the lock wall 25 and guided with its `flat portion in the interspace between the wa'l'l I6 and theadiiacentdisc I6", and projects with` the `projectionL2Iu. `from `the opening 22 of thecoverin'gfplate upon 'the small side 50 of the doorfwingzl 51'. `This displacing of the sleeve I5 with the disc I6 simultaneous with that of the remaining sleeve I5 and so on and discs I6' and so on, is rendered possible by setting the bolt I0 relatively to the shaft I I into the corresponding intermediate position IIIH between the two end positions I0 and Ill (Fig. 1) of which the locking position with regard to the narrow end face 50 of the door Wing 5I is illustrated by full lines in Fig. l.

Only in this intermediate position (Figs. 3 and 4) can the sleeves I5 and I5 together with the` slotted discs I6 and I6 be depressed (Fig. Ll)A and brought out of engagement with the teeth 58 of the upper sleeve parts 23, 235, which latter remain in their position in fixed connection with the dial rings I9, I9'. These rings can 'thenbe turned without hindrance for setting up a new combination, whereupon the lock can subsequently be locked or opened only under the new combination. The yoke 2| with the wedges 2I is shown in side view in Fig. 5.

If a new combination is to be set, the dial rings I9, I9 and so on and consequently the connected sleeves and discs must first be set vin accordance with a previous combination in the open position of the door and the bolt entirely slid out, whereupon the bolt I0 is partly drawn back into the intermediate position I0" so that the fence 24 of the lever 24 of the bolt enters the correct 'slot I8 of the discs I6, I6'. Inl this position, the yoke 2I is slid with its wedges 2| between the xed lock wall 26 and the opposite slotted disc I6', whereupon a new combination may beset, as the upper sleeve parts 23, 23 with the dial rings I9, I9 have by this means been brought out of engagement at 53 with the lower halves I5, I5 of the slotted discs I6, I6', which latter are still locked against rotation by the fence 24. The newly set combination is then Valid from the moment of the complete closing or opening of the bolt II! after previous removal of the wedge pair 2l by sliding back the yoke 2I into the originally illustrated position, as in these two end positions after the sliding out of these wedges, both sleeve halves are again in engagement and the fence is outside the slot I8 of the discs I6, I6 both in its inner end position and in its outer end position (Fig. 2) with regard to the slotted periphery-of the discs I6, I6. f

The fence 24 can be swung over in the direction of the arrow a- (Fig. 2) by the operation of the hand grip 25 on sliding the bolt II) from the inner side of the door, and this for the purposeof enabling the locked in person to open immediately the lock without using the combination. lThe oscillatable lever 24 with the nose 24v is turnable about a xed pivot 25. The other end of this lever terminates in a nose 21 (Fig.-2) which, on

swinging over the fence prevents unauthorized removal of the sleeves I5, I5 from'engagement with the upper sleeve parts 23, 23', that is, without knowledge of the old combination.

In order to prevent also opening ofthe lock from the inside by operating the hand-grip 25, for instance on leaving the apartment for alonger period, or the like, there` is provided between the stationary lock wall 26 and the fence24 an oscillatable lever 28 with a bent portion, 29 which will lie opposite the fence When this lever 28 is turned into this locked position by hand before closing the door. In this case the proper combination must be set also on locking the door.

In order that on opening the lock after/setting the combination, the tumblers should automatically turn and thereby displace the set up but still I0 within the range of the arrow c-c within the reach of the slotted discs I6, I6 in such a manner that upon its movement it co-operates every time with the slotted periphery and thereby. automatically changes their original set position. This spring 3|, 3I is for this purpose arcuate shaped and bent at an angle at the end 33. It is clear that this spring need not be arranged turnable upon the fixed pivot as a two-armed spring lever, so that it can move with its free end in the already described manner in the reach of the slotted periphery of the discs I6, I6.

In the constructional example according to Figs. 6 to 8, the inner end of the disc I6 is provided upon its inner ange-like end with a segment shaped projection 35 which co-operates with the recess 36 of the bolt Il) and with an analogous recess 36 of the ring 38 of the disc 3'I, the ring enclosingthe shaft II. Between the inner disc I6 and the disc 31 is arranged a helical spring 39 which permanently holds in engagement the discs I6, I6 and their lower sleeve parts I5, I5 with the corresponding upper sleeve halves 23, 23 in above described manner at the toothed separation plane 53. This engagement is also in this constructional example interrupted by the yoke 2| with the wedges 2|' of Fig. 5. The segmentshaped projection 35 projects normally with its inclined end only into the recess 36 of the disc 31. If, however, the bolt IIJ is slid into the previously described intermediate position, this projection 35 can penetrate still more deeply and into the recess 36 of the bolt I0, whereby setting of a new combination is rendered possible. Sliding of the bolt is, of course, in this position, possible only if the original combination has been set, s0 that the right slots I8 of the discs I6, I6 are exactly above each other so that the nose 24' of the double armed lever 24 can be inserted into them, said lever being in an analogous manner as in the previous example, arranged upon the inner side of the door. The recess 36 in the bolt is shown in side view in Fig. 8, from which may be also seen the arrangement of the bent double armed lever 24 with the nose 24.

'I'he remaining mode of operation of this combination lock according to Figs. 6 to 8 is identical with that of the lock according to Figs. 1 to 5.

What I claim is:

In a -combination lock the combination of a bolt having two projections in the reach thereof, a casing, a spring pivoted to said casing, said spring. having two arms, one of said arms engaging said bolt between said projections, a plurality of discs having a plurality of false slots and bolt .releasing slots in the peripheries thereof, combination means for arranging said discs in a predetermined manner to permit movement of said bolt, the other of said spring arms being adapted to engage said discs in said false slots to destroy the combination set up on said combination means after saidbolt is moved.

ANTONN KITTLER. 

